ばか！バカ！　馬鹿ー月！

Hello everyone.

I'll be going to Japan in some weeks. There, I would like to buy some Light novel if I get the possibility and if prices are good. So I would like to get some suggestion of easy to read Light novel for beginner.

Plus if anyone know some place name (in Tokyo)) where it's possible to buy cheap book, I'll take that gladly too.

Rokka no Yuusha is among the easiest to read in japanese I've read ImO. The good news is that it's also very good.
I'd say Gosick, baccano, tsukumodou kottouten are fairly easy too, especially the last one.

Never went to tokyo when I was in Japan, so can't help you for the other question.